Context menu in the header

Make the following settings in the context menu of the header:

Dupliquer la colonne	Duplicated the column under the cursor.
Dupliquer les colonnes sélectionnées	Duplicates the selected column.
Insérer colonne vide à gauche	Adds an empty row at the left of the clicked column.
Insérer colonne vide à droite	Adds an empty row at the right of the clicked column.
Supprimer colonne	Deletes the column at the cursor position.